Lamp



FIG. 1 is a perspective view of the lamp;

FIG. 2 is a side elevational view of the lamp;

FIG. 3 is a front elevational view of the lamp;

FIG. 4 is a rear elevational view of the lamp;

FIG. 5 is a bottom plan view of the lamp; and,

FIG. 6 is a top plan view of the lamp.

The broken lines are for purposes of illustration only and form no part of the claimed design. 

The ornamental design for a lamp, as shown and described. 